JSON Beautifier

This tool provides a precise JSON beautifier and formatter that accepts raw JSON text and returns a readable, validated version. It supports both pretty-printed output with consistent indentation and compact, minified form for data interchange. It is designed for developers, API engineers, and data professionals who review payloads, logs, or documentation. By separating format concerns from data semantics, teams can maintain consistency across code, tests, and artifacts without manual reformatting.
Conceptually, the tool parses the input with a standard JSON parser, detects syntax errors, and then applies a formatting pipeline. Optional features include recursive key sorting, which helps with diffing, as well as duplicate key detection. Error details include line and column positions to aid quick debugging. Outputs include the formatted JSON string, a validity flag, and a structured error list for automated processing.
Common use cases include preparing API request bodies, generating documentation examples, validating payloads from tests, and ensuring consistent formatting in source control. The tool emphasizes correctness, reproducibility, and speed, operating entirely in memory and avoiding any external dependencies. It is language-agnostic and locale-neutral, compatible with UTF-8 data and international characters. It is intentionally scoped to standard JSON (ECMA-404) and excludes YAML, JSON5, or schema enforcement unless explicitly enabled.